Projection lamp with rolling lamp effect

ABSTRACT

A projection lamp with a rolling lamp effect includes an outer housing, which is an inner hollow structure with an opening; a lampshade, which is a light transmitting structure, covering the opening of the outer housing and fixedly connected to the outer housing; a light emitting module, which is fixed in the outer housing through a fixed shaft; and a light condensing ball lens, disposed in the outer housing. A shaft sleeve is disposed on the outer surface of the light condensing ball lens in a protruding way; the light emitting module is positioned in the light condensing ball lens and is fixed in the shaft sleeve; the motor, which is fixedly disposed in the outer housing, is in a transmission connection with the shaft sleeve, and the motor can drive the light condensing ball lens to rotate around the axis of the fixed shaft in the outer housing.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims priority under 35 USC § 119 to Chinese PatentApplication No. 201710579868.5, filed 17 Jul. 2017, the disclosure ofwhich is incorporated herein by reference.

TECHNICAL FIELD

The present disclosure belongs to the technical field of projectionlamps and relates to a projection lamp with a rolling lamp effect.

BACKGROUND

LED projection lamps are mainly used as decorative lighting and alsoused for profiling large-sized buildings. The technical parametersthereof are basically similar to those of projection lamps. Relative tothe round structure of LED projection lamps, it seems that the heatdissipation device of the strip-like structure of the LED lamp is moreeasily handled.

So far, projection lamps with a rolling structure have been seen in theprojection lamp field. For example, the Chinese Patent Application No.201510332599.3 (Chinese Patent Publication No. 106322292 A) discloses aprojection lamp with a rolling snowflake effect, which comprises aprojection device and a bracket disposed at the bottom of the projectiondevice. In this structure, a motor is fixed in a housing; a rotatingshaft of the motor is connected to a light condensing ball lens; therotating shaft is radially opposite to a connecting rod portion, whichis connected to a fixed part, relative to the center of the lightcondensing ball lens, which means that the rotating shaft is coaxialwith the connecting rod portion. In this way, the projection lamp canproject movable light, and the light effect is more gorgeous and cancreate different atmospheres. However, the following technical problemsexist. In this projection lamp, the rotating shaft and the connectingrod portion are installed at the housing at the same time, which meansthat two symmetric ends are both connected to the housing. The rotatingshaft and the connecting rod portion are coaxially arranged, so thelight condensing ball lens has two points connected to the housing. Ifthe light condensing ball lens rotates normally and smoothly, highrequirements are imposed on the processing accuracy and installationaccuracy of all the parts, resulting in difficulties in the processingand installation of the parts and high inflexibility in use.

SUMMARY

One aspect of the present disclosure is a projection lamp with a rollinglamp effect that has low requirements for its processing accuracy andinstallation accuracy and is conveniently processed and installed.

In one example embodiment, a projection lamp with a rolling lamp effectincludes an outer housing, which is an inner hollow structure with anopening; a lampshade, which is a light transmitting structure, coveringthe opening of the outer housing and fixedly connected to the outerhousing; a light emitting module, fixed in the outer housing through afixed shaft, wherein the light projecting direction of the lightemitting module points at the lampshade; a light condensing ball lens,disposed in the outer housing, wherein a shaft sleeve is disposed at theouter surface of the light condensing ball lens in a protruding way, thelight emitting module is positioned in the light condensing ball lensand the fixed shaft is positioned in the shaft sleeve; and a motor whichis fixedly disposed in the outer housing and is in a transmissionconnection with the shaft sleeve, wherein the motor is capable ofdriving the light condensing ball lens to rotate around the axis of theshaft sleeve in the outer housing.

In one example embodiment, the shaft sleeve is externally sleeved with atransmission sleeve which is in a fixed connection with the shaftsleeve; the transmission sleeve is in a transmission connection with themotor through a gear, and the shaft sleeve is capable of synchronouslyrotating along with the transmission sleeve.

In one example embodiment, the transmission sleeve has one end which isfixedly connected with a gear ring; the gear ring is internally providedwith a positioning bearing; the positioning bearing is pressed againstthe transmission sleeve and respectively tightly fits with the gear ringand the fixed shaft; an output shaft of the motor is provided with agear, and the gear is in an engaged connection with the gear ring.

In one example embodiment, the inner diameter of the gear ring isgreater than the inner diameter of the transmission sleeve; a platformis formed between the transmission sleeve and the gear ring; and thepositioning bearing is pressed against the platform.

In one example embodiment, the transmission sleeve is sleeved with apositioning ring; the positioning ring is positioned between the motorand the lampshade and remains fixed relative to the motor and thelampshade; and the transmission sleeve is capable of rotating in thepositioning ring.

In one example embodiment, a support board is disposed between the motorand the positioning ring; the support board has one end pressed againstthe motor and the other end provided with an arc-shaped groove; and thepositioning ring is positioned in the arc-shaped groove and is tightlypressed against the support board.

In one example embodiment, a baffle, which is fixedly connected with thesupport board and tightly presses the positioning ring against thetransmission sleeve, is disposed on one side of the arc-shaped groove.

In one example embodiment, an arc-shaped positioning sleeve is disposedat one end of the support board; the two ends of the arc-shapedpositioning sleeve respectively extend out of a mounting portion; amounting seat is disposed on the inner surface of the outer housing; themotor is disposed in the mounting seat; the motor is positioned in thearc-shaped sleeve, and the mounting portion is fixedly connected withthe mounting seat.

In one example embodiment, a main cover plate is fixedly disposed in theouter housing; a limiting seat is fixedly disposed on the inner surfaceof the main cover plate; the limiting seat is formed with a limitinggroove; and the positioning ring is positioned in the limiting grooveand pressed against the limiting seat.

In one example embodiment, a stopper is disposed on one side of thelimiting seat, and the positioning ring is pressed against the stopper.

In one example embodiment, an auxiliary cover plate is fixedly disposedin the outer housing; a limiting plate is fixedly disposed on the innersurface of the auxiliary cover plate; the limiting plate is formed witha limiting hole; a limiting shaft which is coaxial with the shaft sleeveis disposed on the outer surface of the light condensing ball lens in aprotruding way; and the limiting shaft extends into the limiting holeand is spaced from the limiting hole.

In one example embodiment, the outer housing is internally provided witha fixed seat which is in a fixed connection with the outer housing; thefixed seat is provided with a fixed sleeve; and the fixed shaft isfixedly connected with the fixed sleeve in a plugged way.

In one example embodiment, a plug board, which is in a pluggedconnection with the inner surface of the outer housing, is disposed onthe lower surface of the fixed seat in a protruding way.

In one example embodiment, the light emitting module of the projectionlamp with a rolling lamp effect includes a lamp base, having twoadjacent mounting grooves which are disposed in an inclined way; twolamp panels respectively embedded in two mounting grooves, wherein eachone of the lamp panels is provided with a light emitting element; aconnecting board, fixedly connected to one side of the lamp base,wherein a connecting sleeve is fixedly disposed on the surface of theconnecting board, and the fixed shaft is fixedly connected with theconnecting sleeve in a plugged way.

In one example embodiment, the light condensing ball lens is enclosed bytwo left and right hollow semi-spheres; a plurality of convex lenseswhich are connected in turn are uniformly disposed on the inner surfaceof each one of the two left and right semi-spheres; each one of theshaft sleeve and the limiting shaft is enclosed by parts which arerespectively positioned on the two left and right semi-spheres; and thelight emitting module is positioned in the two semi-spheres.

In one example embodiment, the limiting shaft is sleeved with a shaftcover, and the shaft cover is in a plugged connection with the limitingshaft.

In one example embodiment, the outer housing is internally equipped witha circuit board; the circuit board is electrically connected with thelight emitting module and the motor, respectively; and the circuit boardis provided with a power switch and a wiring plug that penetrate throughthe outer housing and are fixedly connected with the outer housing.

The present disclosure may have the following beneficial effects:

In one example embodiment, the light condensing ball lens is connectedwith the fixed shaft in the outer housing through the shaft sleeve whichis disposed on the outer surface thereof, the light condensing ball lensrotates through the transmission connection between the motor and theshaft sleeve such that the shaft sleeve plays a dual role of connectingthe light condensing ball lens and driving the light condensing balllens to rotate, so the whole structure realizes a single-pointconnection between the light condensing ball lens and the outer housing.The requirements for the processing accuracy and the installationprocess of all parts are low such that all parts are convenientlyprocessed and installed, so the whole mounting structure is simplifiedand the use is very flexible.

BRIEF DESCRIPTION OF DRAWINGS

FIG. 1 is a front three-dimensional view of the present disclosure.

FIG. 2 is a rear three-dimensional view of the present disclosure.

FIG. 3 is an exploded view of the present disclosure.

FIG. 4 is a sectional view of an outer housing and the internalstructure thereof in the present disclosure.

FIG. 5 is a three-dimensional view of some structure in the presentdisclosure.

FIG. 6 is a three-dimensional view of a main cover plate in the presentdisclosure.

FIG. 7 is a three-dimensional view of a secondary cover plate in thepresent disclosure.

DETAILED DESCRIPTION

The technical solution of the present disclosure is further described inconjunction with the preferred embodiments and attached drawings of thepresent disclosure, but the present disclosure is not limited to theseembodiments.

The present disclosure makes improvements on existing projection lampsfor the purposes of simplifying the mounting structure of the lightcondensing ball lens and the outer housing, lowering the requirementsfor the processing accuracy and installation accuracy of all parts,improving the processing and installation efficiency of the parts, andreducing cost.

As shown in FIGS. 1-5, the present disclosure discloses a projectionlamp with a rolling lamp effect, including an outer housing 10, alampshade 20, a light emitting module 30, a light condensing ball lens40 and a motor 50.

The projection shape of the outer housing 10 is a “+” shape. The outerhousing 10 is an inner hollow structure and has a “+”-shaped opening onthe front elevation. The lampshade 20 is a light transmitting structuremade of light transmitting materials, covering the opening of the outerhousing 10 and fixedly connected with the outer housing 10 throughconnections such as screws. The middle portion of the lampshade 20protrudes outward from the inside to form a spherical protrusion portion21. The light emitting module 30 is disposed at the middle in the outerhousing 10. A fixed shaft 11 is disposed between the light emittingmodule 30 and the outer housing 10. The fixed shaft 11 has one endfixedly connected with the light emitting module 30 and has the otherend connected with the outer housing 10. The light projection directionof the light emitting module 30 points at the lampshade 20. The lightcondensing ball lens 40 is an inner hollow spherical structure. Tofacilitate the installation of the light emitting module 30, the lightcondensing ball lens 40 is enclosed by two left and right inner hollowsemi-spheres. A plurality of round convex lenses 41 which are connectedwith one another are uniformly distributed on the inner surface of eachone of the two left and right semi-spheres. The light condensing balllens 40 is disposed in the outer housing 10 and extends into thespherical protrusion portion 21. A shaft sleeve 42 is disposed on theouter surface of the light condensing ball lens 40 in a protruding way.The shaft sleeve 42 is enclosed by parts which are respectivelypositioned on the two left and right semi-spheres. The axis of the shaftsleeve 42 is superimposed with the circle center of the light condensingball lens 40. The light emitting module 30 is positioned in the lightcondensing ball lens 40. The fixed shaft 11 is positioned in the shaftsleeve 42 and is fixed relative to the shaft sleeve 42. The motor 50 isfixedly disposed in the outer housing 10 and is in a transmissionconnection with the shaft sleeve 42. The outer housing 10 is alsointernally equipped with a circuit board 12. The circuit board 12 iselectrically connected with the light emitting module 30 and the motor50 at the same time. The circuit board 12 is provided with a powerswitch 13 for controlling the motor 50 and the light emitting module 30.The power switch 13 passes through the outer housing 10 and is fixedwith the outer housing 10. A wiring plug 14 which is electricallyconnected with the circuit board 12 and is connected with the outerhousing 10 is also disposed between the circuit board 12. The wiringcircuit 14 is electrically connected with an external power supply. Thewiring circuit 14 passes through the outer housing 10 and is fixed withthe outer housing 10.

During working, the motor 50 drives the light condensing ball lens 40 torotate around the axis of the shaft sleeve 42 in the outer housing 10.The motionless light emitting module 30 projects light toward thelampshade 20. The light rays are projected to the convex lens portion 41in the moving light condensing ball lens 40 and form movable light spotswith a snowflake shape or other shapes on projected objects outside thelight condensing ball lens 40.

In this structure, the light condensing ball lens 40 and the outerhousing 10 form a single-point fixed connection through the fixed shaft11; the shaft sleeve 42 plays a supporting and rotating role. Thesingle-point connection ensures low requirements for processing accuracyand installation accuracy of all parts of the projection lamp,facilitates processing and installation of all products, simplifiesstructure, and reduces cost to a certain degree.

On the basis of the above structure, the present disclosure makesfurther improvements and detailing.

As shown in FIGS. 3-5, the shaft sleeve 42 is externally sleeved with atransmission sleeve 43 which is in a fixed connection with the shaftsleeve; the transmission sleeve 43 is fixed with the lampshade 20relative to the outer housing 10 in the radial direction thereof; thetransmission sleeve 43 and the motor 50 are in a transmission connectionthrough a gear 51 and the shaft sleeve 42 can synchronously rotate alongwith the transmission sleeve 43.

Preferably, the transmission sleeve 43 has one end which is fixedlyconnected with a gear ring 44; the inner diameter of the gear ring 44 isgreater than the inner diameter of the transmission sleeve 43; aplatform 43 a is formed between the transmission sleeve 43 and the gearring 44; the gear ring 44 is internally provided with a positioningbearing 44 a; the positioning bearing 44 a is pressed against theplatform and respectively fits tightly with the gear ring 44 and thefixed shaft 11; and an output shaft of the motor 50 is provided with thegear 51. Here, the output shaft of the motor 50 and the fixed shaft 11are disposed in parallel, and the gear 51 is in an engaged connectionwith the gear ring 44.

The whole shaft sleeve 42 is enclosed by parts which are respectivelypositioned on the two semi-spheres; the transmission sleeve 43 fixes thetwo convex sleeves to form the shaft sleeve 42 and also plays the roleof fixing the two semi-spheres, thus improving the integrity of thelight condensing ball lens 40; the configuration of the positioningbearing 44 a enhances the stability of the gear ring 44 and thetransmission sleeve 43 in the radial direction such that the gear ring44 and the transmission sleeve 43 rotate more stably and flexibly;besides, the positioning bearing 44 a is pressed against the platform 43a to prevent the positioning bearing from moving axially; thetransmission sleeve 43 and the motor 50 are in a transmission connectionthrough the gear 51 and the gear ring 44 such that the light condensingball lens 40 rotates stably; moreover, the gear 51 also plays the roleof supporting the gear ring 44, improving the stability of the lightcondensing ball lens 40.

Of course, the transmission between the transmission sleeve 43 and themotor 50 can also be implemented by other means, for example a worm andgear transmission.

As shown in FIGS. 3-5, the transmission sleeve 43 is sleeved with apositioning ring 45; the positioning ring 45 is positioned between themotor 50 and the lampshade 20 and remains fixed relative to the motorand the lampshade. The transmission sleeve 43 can rotate in thepositioning ring 45, which means that the positioning ring 45 is pressedagainst the motor 50 and the lampshade 20 directly or indirectly suchthat the positioning ring 45 remains fixed.

In this structure, the fixed shaft 11 is motionless, and the shaftsleeve 42 and the fixed shaft 11 are supported only by one supportpoint, namely the positioning bearing 44 a between the transmissionsleeve 43 and the fixed shaft 11, resulting in that the light condensingball lens 40 is unstable and tends to shake in the outer housing 10. Byconfiguring the positioning ring 45, a support point is added onto thetransmission sleeve 43 such that the whole transmission sleeve 43 formsa two-point support, thus improving the stability of the lightcondensing ball lens 40; moreover, the positioning ring 45 entirelyencloses the periphery of the transmission sleeve 43, achieving a goodeffect of positioning the transmission sleeve 43.

Further, a support board 60 is disposed between the motor 50 and thepositioning ring 45; the support board 60 has one end pressed againstthe motor 50 and the other end provided with an arc-shaped groove 61;the positioning ring 45 is positioned in the arc-shaped groove 61 and istightly pressed against the support board 60; a baffle 62 which isfixedly connected with the support board is disposed on one side of thearc-shaped groove 61; a limiting boss (not shown in the figures) isdisposed on the transmission sleeve 43, and the positioning ring 45 isrespectively pressed against the baffle 62 and the limiting boss.

As shown in FIGS. 3-6, a main cover board 70 is fixedly disposed at theexit of the outer housing 10; the main cover plate 70 is close to thelampshade 20; a limiting seat 71 is fixedly disposed on the innersurface of the main cover plate 70; the limiting seat 71 is formed witha limiting groove 72; the positioning ring 45 is positioned in thelimiting groove 72 and is pressed against the limiting seat 71; astopper 73 is disposed on one side of the limiting seat 71, and thepositioning ring 45 is pressed against the stopper 73.

By configuring the support board 60 and the limiting seat 71, twoopposite fixing points are formed on the outer surfaces on two sides ofthe positioning ring 45, thus playing the role of fixing the positioningring 45, improving the stability of the positioning ring 45 in theradial direction, and achieving a good effect of fixing the positioningring 45. The baffle 62, the limiting boss, and the stoppers 73 all playthe role of limiting the positioning ring 45 from moving axially, thusensuring the stability of the positioning ring 45 in the axialdirection.

It is worth mentioning that the limiting seat 71 can be directlydisposed on the lampshade 20, and when the lampshade 20 is fixedlyconnected with the outer housing 10, the limiting seat 71 can bedirectly pressed against the positioning ring 45.

As shown in FIG. 3, an arc-shaped positioning sleeve 63 is disposed atone end of the support board 60; the two ends of the arc-shapedpositioning sleeve 63 respectively extend out of the mounting portion 63a; a mounting seat 15 is disposed on the inner surface of the outerhousing 10; the motor 50 is disposed in the mounting seat 15; the motor50 is positioned in the arc-shaped positioning sleeve 63 and themounting portion 63 a is fixedly connected with the mounting seat 15through connections such as screws.

Through the arc-shaped positioning sleeve 63, the motor 50 can bedirectly fixed on the mounting seat 15 without extra fixation betweenthe motor 50 and the mounting seat 15, thus facilitating theinstallation of the motor 50. At the same time, the support board 60 isfixed with the outer housing 10, also improving the stabilization effectof the support board 60.

As shown in FIGS. 3, 4, 5, and 7, an auxiliary cover plate 80 is fixedlydisposed in the outer housing 10; a limiting plate 81 vertical to theauxiliary cover plate 80 is fixedly disposed on the inner surface of theauxiliary cover plate 80; the limiting plate 81 is formed with alimiting hole 82; a limiting shaft 46 which is coaxial with the shaftsleeve 42 is disposed on the outer surface of the light condensing balllens 40 in a protruding way; the limiting shaft 46 is also enclosed bytwo parts which are respectively disposed on the two semi-spheres in aprotruding way; the limiting shaft 46 is sleeved with a shaft cover 47;the whole limiting shaft 46 is in a plugged connected with the shaftcover 47; the shaft cover 47 and the limiting shaft 46 extend into theliming hole 82 and are spaced from the limiting hole 82, which meansthat under normal conditions the shaft cover 47 and the limiting plate81 remain in a non-contact state.

The positioning bearing 44 a and the positioning ring 45 form twosupport points of the light condensing ball lens 40, but the two supportpoints are both positioned on the same side of the light condensing balllens 40. In this circumstance, the light condensing ball lens 40 shakeswhen the outer housing 10 is moved or impacted, greatly affecting thetwo support points of the light condensing ball lens 40 and the overallstability of the light condensing ball lens 40.

By combination between the limiting plate 81 and the limiting shaft 46,the limiting plate 81 can stop the limiting shaft 46 when the lightcondensing ball lens 40 shakes to prevent the light condensing ball lens40 from shaking vigorously, thus improving the stability of the lightcondensing ball lens 40 when the outer housing 10 is impacted or moved.

The shaft cover 47 fixes the two parts of the limiting shaft 46, thusplaying the role of fixing the light condensing ball lens 40 on theother side of the light condensing ball lens 40.

It is worth mentioning that the limiting shaft 46 does not have asupport effect, but only aids in preventing the light condensing balllens 40 from shaking vigorously.

As shown in FIGS. 3 and 4, the outer housing 10 is internally providedwith a fixed seat 16; the fixed seat 16 is fixedly connected with theouter housing 10 through connections such as screws; the fixed seat 16is provided with a fixed sleeve 16 a; and one end of the fixed shaft 11is fixedly connected with the fixed shaft 16 a in a plugged way.

By using this structure, the fixed shaft 11 and the outer housing 10 areflexibly dismantled and installed, and the plugged connection ensuresthat the fixing effect of the fixed shaft 11 is relatively good.

Further, a plug board 16 b is disposed on the lower surface of the fixedseat 16 in a protruding way; the inner surface of the outer housing 10is formed with a corresponding slot (not shown in the figures); and theplug board 16 b is connected with the slot in a plugged way.

Through the combination between the plug board 16 b and the slot, thefixed seat 16 can be fixed on the inner surface of the outer housing 10in advance, and the positioning is fast and accurate and facilitates thesubsequent connection between the fixed seat 16 and the outer housing 10by using screws.

As shown in FIG. 3, the light emitting module 30 includes a lamp base31, lamp panels 32 and a connecting plate 33.

The lamp base 31 is integrally “V” shaped, having two adjacent inclinedmounting grooves on the outer surface thereof. Two lamp panels 32 areprovided; the two lamp panels 32 are respectively embedded in the twomounting grooves and are fixedly connected with the lamp base 31; eachone of the lamp panels 32 is provided with a light emitting element 32a; and the light emitting elements 32 a are electrically connected withthe circuit board 12. Preferably, the light emitting elements 32 a areLED lamps. The connecting plate 33 is fixedly connected to one side ofthe lamp base 31. A connecting sleeve 33 a is fixedly disposed on theouter surface of the connecting plate 33. The other end of the fixedshaft 11 is fixedly connected with the connecting sleeve 33 a in aplugged way.

The lamp base 31 is in a plugged connection with the fixed shaft 11 tofacilitate the dismantling and installation of the fixed shaft 11 andthe lamp base 31, and the structure of the lamp base 31 and theconnection structure of the lamp panels 32 and the lamp base 31 can bothbe other structures and are not limited to the structure as mentioned inthis embodiment.

The working principle of the present disclosure is as follows:

In use, the projection lamp is electrically connected to an externalpower supply through the wring plug 14; then, the power switch 13 isturned on; and the circuit board 12 respectively powers the motor 50 andthe light emitting elements 32 a.

The motor 50 drives the light condensing ball lens 40 to rotate aroundthe axis of the shaft sleeve 42; the light emitting elements 32 a emitlight which is projected to external projected objects through theconvex lens portion 41 on the light condensing ball lens 40 and thelampshade 20; and as the light condensing ball lens 40 rotates, thesurfaces of the projected objects form moving light spots similar tosnowflake.

When the projection lamp is moved or the projection lamp is impacted,the limiting shaft 46 contacts the limiting plate 81 to prevent thelight condensing ball lens 40 from shaking vigorously, thus ensuring thestability of the light condensing ball lens 40.

The specific embodiments described in the text are used for illustratingthe principle of the present disclosure only. Those skilled in the artcan make various amendments or supplementations or make similarsubstitutions on the basis of the described specific embodiments. Theamendments, supplementations and substitutions should fall within theprinciple or the protective scope claimed by the claims of the presentdisclosure.

The invention claimed is:
 1. A projection lamp with a rolling lampeffect, comprising: an outer housing, which is an inner hollow structurewith an opening; a lampshade, which is a light transmitting structure,covering the opening of the outer housing and fixedly connected to theouter housing; a light emitting module, fixed in the outer housingthrough a fixed shaft, wherein the light projecting direction of thelight emitting module points at the lampshade; a light condensing balllens, disposed in the outer housing, wherein a shaft sleeve is disposedat the outer surface of the light condensing ball lens in a protrudingway, the light emitting module is positioned in the light condensingball lens and the fixed shaft is positioned in the shaft sleeve; and amotor, which is fixedly disposed in the outer housing and is in atransmission connection with the shaft sleeve, wherein the motor iscapable of driving the light condensing ball lens to rotate around theaxis of the shaft sleeve in the outer housing.
 2. The projection lampwith a rolling lamp effect according to claim 1, wherein the shaftsleeve is externally sleeved with a transmission sleeve which is in afixed connection with the shaft sleeve; the transmission sleeve is in atransmission connection with the motor through a gear, and the shaftsleeve is capable of synchronously rotating along with the transmissionsleeve.
 3. The projection lamp with a rolling lamp effect according toclaim 2, wherein the transmission sleeve has one end which is fixedlyconnected with a gear ring; the gear ring is internally provided with apositioning bearing; the positioning bearing is pressed against thetransmission sleeve and respectively fits tightly with the gear ring andthe fixed shaft; an output shaft of the motor is provided with a gear,and the gear is in an engaged connection with the gear ring.
 4. Theprojection lamp with a rolling lamp effect according to claim 3, whereinthe inner diameter of the gear ring is greater than the inner diameterof the transmission sleeve; a platform is formed between thetransmission sleeve and the gear ring; and the positioning bearing ispressed against the platform.
 5. The projection lamp with a rolling lampeffect according to claim 2, wherein the transmission sleeve is sleevedwith a positioning ring; the positioning ring is positioned between themotor and the lampshade and remains fixed relative to the motor and thelampshade; and the transmission sleeve is capable of rotating in thepositioning ring.
 6. The projection lamp with a rolling lamp effectaccording to claim 5, wherein a support board is disposed between themotor and the positioning ring; the support board has one end pressedagainst the motor and the other end provided with an arc-shaped groove;and the positioning ring is positioned in the arc-shaped groove and istightly pressed against the support board.
 7. The projection lamp with arolling lamp effect according to claim 6, wherein a baffle, which isfixedly connected with the support board and tightly presses thepositioning ring against the transmission sleeve, is disposed on oneside of the arc-shaped groove.
 8. The projection lamp with a rollinglamp effect according to claim 6, wherein an arc-shaped positioningsleeve is disposed at one end of the support board; the two ends of thearc-shaped positioning sleeve respectively extend out of a mountingportion; a mounting seat is disposed on the inner surface of the outerhousing; the motor is disposed in the mounting seat; the motor ispositioned in the arc-shaped sleeve, and the mounting portion is fixedlyconnected with the mounting seat.
 9. The projection lamp with a rollinglamp effect according to claim 8, wherein a stopper is disposed on oneside of the limiting seat, and the positioning ring is pressed againstthe stopper.
 10. The projection lamp with a rolling lamp effectaccording to claim 5, wherein a main cover plate is fixedly disposed inthe outer housing; a limiting seat is fixedly disposed on the innersurface of the main cover plate; the limiting seat is formed with alimiting groove; and the positioning ring is positioned in the limitinggroove and pressed against the limiting seat.
 11. The projection lampwith a rolling lamp effect according to claim 1, wherein an auxiliarycover plate is fixedly disposed in the outer housing; a limiting plateis fixedly disposed on the inner surface of the auxiliary cover plate;the limiting plate is formed with a limiting hole; a limiting shaftwhich is coaxial with the shaft sleeve is disposed on the outer surfaceof the light condensing ball lens in a protruding way; and the limitingshaft extends into the limiting hole and is spaced from the limitinghole.
 12. The projection lamp with a rolling lamp effect according toclaim 11, wherein the light condensing ball lens is enclosed by two leftand right hollow semi-spheres; a plurality of convex lenses which areconnected in turn are uniformly disposed on the inner surface of eachone of the left and right two semi-spheres; each one of the shaft sleeveand the limiting shaft is enclosed by parts which are respectivelypositioned on the left and right two semi-spheres; and the lightemitting module is positioned in the two semi-spheres.
 13. Theprojection lamp with a rolling lamp effect according to claim 12,wherein the limiting shaft is sleeved with a shaft cover, and the shaftcover is in a plugged connection with the limiting shaft.
 14. Theprojection lamp with a rolling lamp effect according to claim 1, whereinthe outer housing is internally provided with a fixed seat which is in afixed connection with the outer housing; the fixed seat is provided witha fixed sleeve; and the fixed shaft is fixedly connected with the fixedsleeve in a plugged way.
 15. The projection lamp with a rolling lampeffect according to claim 14, wherein a plug board which is in a pluggedconnection with the inner surface of the outer housing is disposed onthe lower surface of the fixed seat in a protruding way.
 16. Theprojection lamp with a rolling lamp effect according to claim 1, whereinthe light emitting module comprises: a lamp base having two adjacentmounting grooves which are disposed in an inclined way; two lamp panelsrespectively embedded in two mounting grooves, wherein each one of thelamp panels is provided with a light emitting element; and a connectingboard fixedly connected to one side of the lamp base, wherein aconnecting sleeve is fixedly disposed on the surface of the connectingboard, and the fixed shaft is fixedly connected with the connectingsleeve in a plugged way.
 17. The projection lamp with a rolling lampeffect according to claim 1, wherein the outer housing is internallyequipped with a circuit board; the circuit board is electricallyconnected with the light emitting module and the motor, respectively;and the circuit board is provided with a power switch and a wiring plugthat penetrate through the outer housing and are fixedly connected withthe outer housing.